Benelli M4 vs Mossberg 590

Quick Comparison — Benelli M4 vs Mossberg 590

Who Is the Benelli M4 For?

The Benelli M4 is the gold standard of semi-auto tactical shotguns. It uses Benelli's proprietary ARGO (Auto-Regulating Gas Operated) system — a self-cleaning, twin-piston design that cycles reliably with everything from light 2.75" target loads to heavy 3" magnums without any adjustment. The M4 has been adopted by the US Marine Corps as the M1014 Joint Service Combat Shotgun, and is also used by the Italian Army, British SAS, and dozens of special operations units worldwide. The M4 is for shooters who demand the absolute fastest follow-up shots, the softest recoil, and the most reliable semi-auto action money can buy. It is the semi-auto shotgun that law enforcement and military units trust when stopping power and speed are critical.

Strengths of the Benelli M4

• Semi-Auto Speed: The M4 cycles at approximately 4 rounds per second with no manual pump action required. In a defensive scenario, this speed advantage — no wasted motion cycling the forend — is critical. You keep your eyes on target and your support hand on the forend.
• Exceptional Recoil Reduction: The ARGO gas system absorbs recoil energy to cycle the action, significantly reducing felt recoil compared to any pump shotgun. The M4 is comfortable to shoot with heavy defensive loads, even for smaller-framed shooters.
• Reliable with All 12-Gauge Loads: The ARGO system self-regulates gas pressure. It cycles light 2.75" target loads and heavy 3" magnums without any gas valve adjustment or friction ring configuration. Point and shoot.
• Military-Grade Build Quality: The M4 is built to Italian standards with a CNC-machined aluminum receiver with steel inserts at wear points. The stock is glass-reinforced polymer. The finish is anodized and corrosion-resistant. It is a shotgun designed to last a lifetime of hard use.

Weaknesses of the Benelli M4

• Extreme Price: At $1,800–$2,200, the M4 costs 4x the Mossberg 590. It is the most expensive production tactical shotgun on the market by a significant margin.
• Heavier Weight: At 8.9 lbs, the M4 is heavy. The gas system, heavy barrel, and collapsible stock add mass. It is not a lightweight gun to carry all day during training or competition.
• Break-In Period: The M4 has a 200–300 round break-in period with heavy loads before it reliably cycles light target ammunition. Some owners report feeding issues with the lightest Walmart birdshot until the gun is fully broken in.
• Maintenance Complexity: The M4's gas system is more complex to disassemble and clean than a pump shotgun. While the ARGO system is self-cleaning, deep cleaning requires more steps than a Mossberg 590.

Who Is the Mossberg 590 For?

The Mossberg 590 is the military-grade evolution of the legendary 500 series pump action shotgun. It features a heavy-walled barrel, metal trigger guard and safety (instead of the plastic parts on the standard 500), and is available with ghost ring sights. The 590A1 meets MIL-SPEC-3443E requirements and is used by the US Army, Navy, and Marines in limited roles. The 590 is for shooters who want a simple, rugged, affordable pump shotgun that cycles any 12-gauge ammunition without complaint — light target loads, heavy magnums, less-lethal rounds, or exotic breaching ammunition. It is the shotgun that works because there is nothing to break.

Strengths of the Mossberg 590

• Absolute Simplicity: The 590 has no gas system, no springs to tune, no complex mechanisms. If the trigger is pulled and the shell fires, you pump the forend to eject and load the next round. It works because there is nothing to break or malfunction.
• Unbeatable Value: At $450–$650, the 590 offers approximately 90% of the defensive capability of the Benelli M4 at 25% of the price. For most shooters, the 590 is the smarter financial decision by a wide margin.
• Universal Ammunition Reliability: A pump shotgun cycles every round, every time — because you are the motor. Light target loads, heavy 3" magnums, less-lethal rounds, exotic ammunition — the 590 does not care. It feeds whatever you put in the magazine tube.
• Military-Grade Durability: The 590A1 features a heavy-walled barrel (0.083" vs 0.058" on the standard 500) and metal trigger guard and safety. It is built to military durability standards. You can drop it, hit it, and abuse it without breaking it.
• Factory Capacity: The 590A1 ships with a 6+1 or 8+1 magazine tube from the factory — more capacity than the M4's standard 5+1.

Weaknesses of the Mossberg 590

• Manual Operation Required: Pumping the forend between every shot costs time and requires fine motor control. Under stress, short-stroking the pump (not cycling it fully) induces a malfunction that requires immediate remedial action and breaks your focus on the threat.
• Full Recoil Transfer: Without a gas system to absorb recoil, the full force of every 12-gauge load is transmitted to your shoulder. Heavy defensive loads in a 7.2-lb gun are punishing, especially for smaller-framed shooters or during extended training sessions.
• Slower Follow-Up Shots: Even with extensive practice, a pump shotgun is slower than a semi-auto for engaging multiple targets. The pump action requires maintaining a specific cadence that often breaks under the stress of a real defensive encounter.

Head-to-Head: 7 Key Categories

1. Speed of Engagement — Winner: Benelli M4

Semi-auto is faster than pump. The M4 cycles at approximately 4 rounds per second with no manual action required. The pump requires a full cycling motion between every shot, which takes more time and fine motor control under stress.

2. Reliability with Any Ammunition — Winner: Mossberg 590

A pump action is inherently more reliable than any semi-auto because the shooter provides the cycling energy. No gas system to clog, no springs to wear. The 590 runs in any condition with any ammunition. The M4 is extremely reliable for a semi-auto, but a pump is simpler.

3. Recoil Management — Winner: Benelli M4

The ARGO gas system absorbs significant recoil energy. The M4 is noticeably more comfortable to shoot with heavy defensive loads than the Mossberg 590. For shooters sensitive to recoil, the M4 is a clear winner.

4. Capacity — Winner: Tie

Both shotguns can be configured with extended magazine tubes for 7+1 or 8+1 capacity. The 590 ships with higher capacity from the factory; the M4 requires an aftermarket extension tube.

5. Durability — Winner: Mossberg 590

The 590A1's mil-spec construction with heavy barrel and metal trigger guard is designed for abuse. A pump shotgun has fewer moving parts and no gas system to fail. For absolute durability, the 590 edges ahead.

6. Value for Money — Winner: Mossberg 590

$500 for a military-grade shotgun versus $2,000 for the semi-auto equivalent. The 590 offers exceptional defensive capability at a fraction of the cost of the M4.

7. Ammunition Versatility — Winner: Mossberg 590

The 590 cycles any 12-gauge ammunition: target loads, magnums, slugs, less-lethal, breaching rounds. The M4 requires a break-in period with heavy loads before it handles light loads reliably.

MatchMyGun Verdict

If budget is no object and you want the fastest, softest-recoiling defensive shotgun money can buy → buy the Benelli M4.

If you want a rugged, affordable, simple shotgun that goes bang every time with any ammunition → buy the Mossberg 590.

The Benelli M4 is the superior shooting experience — faster, softer, and more controllable under stress. The Mossberg 590 is the superior value — cheaper, simpler, and more versatile in ammunition selection. For the majority of shooters, the Mossberg 590 is the right choice. Put the $1,500 you saved into ammunition and training.